He returned to the States in the late '60s, and he was shell-shocked and stayed in his house for a long time, couldn't handle looking at the bright colors and seeing the cars moving so fast on the freeway and things that he thought he was going to - looking forward to seeing, he couldn't handle them when he got back.

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Looking forward, the company said it thought its first-person shooter Call of Duty: Black Ops 2 had "the potential to be biggest-selling game of all time", despite launching a week after Microsoft's well-reviewed Xbox-title Halo 4.

BBC: World of Warcraft pandas help boost Activision profits